Chris Klein's wife is pregnant.

The 'American Pie' actor is to be a father for the second time after announcing his ''beautiful'' significant other Laina Rose Thyfault - who he has 17-month-old son Frederick Easton with - is expecting their second child.

He wrote on Twitter: ''My beautiful angel @lainarose is making another beautiful angel. Easton's going to be a big Brother. 24 weeks along. We are so #blessed. (sic)''

Laina also took to social media to inform her friends about the news, admitting she was ''excited'' about bringing a sibling into the world for their son.

She wrote: ''Excited to share that our little Man will become a Big Brother this May. We are so excited for the adventures ahead and the joy that will fill our 2018 (sic)''

The 38-year-old actor revealed in July 2016 that Laina had given birth to their first child together and thanked her for the ''miracle''.

He wrote on his WhoSay account: ''So incredibly blessed and forever grateful for my amazing wife & our healthy baby boy. Laina delivered me a miracle. (sic)''

Laina wrote on Instagram: ''So excited to announce our precious baby boy, Frederick Easton Klein was born 7/23/16. This little Champ has already mastered his warrior pose and is doing great. Our hearts are bursting with love and joy (sic)''

Chris - who is known for playing Chris 'Oz' Ostreicher in 'American Pie' - and travel agent Laina were dating for four years before they tied the knot in August 2015 after he popped the question in December 2014.

Since making a name for himself in 1999 movie 'American Pie', Chris has gone on to star in several films, including 'Play Dead', 'Game of Aces' and 'Street Fighter: The Legend of Chun-Li'.

What's more, he appeared in an episode of 'The Grinder' in 2016 and had a recurring role in 'Wilfred' between 2011 and 2014.